Hand-operated sand-blast.



No. 882,645. v PATENTED MAR. 24, 1908.

H. MIKOREY. HAND OPERATED SAND BLAST.

APPLICATION FILED MAR. 5, 1907.

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UNITED STATES PATENT OFFICE.

HANS MIKOREY, OF SCHONEBERG, NEAR BERLIN, GERMANY, ASSIGNOR TO THE FIRM OF W. GRAAFF d: COMPAGNIE, GES. MIT BESCHR. HAFTUNG, OF BERLIN, GERMANY.

HAND-OPERATED SAND-B LAST.

have invented a certain new and useful Hand-Operated Sand-Blast, of which the following is a specification.

This invention has reference to a sand blast for operation by hand, in which a removable casing or receptacle for the sand is mounted in a frame for supporting the jet producing nozzle. The said nozzle is displaceably arranged in such a manner, that when not in use, the nozzle will close both the passage for the air under pressure as well as the discharge opening for the sand box or sand receptacle, while when the device is operated, the nozzle will disclose both the exit opening for the compressed air as well as that for the sand.

Upon the drawing the invention is shown by way of example.

Figure 1 is a total view of the device, seen partly in section, with the air admission passage closed and with closed sand nozzle. Fig. 2 shows the lower part of the device, in

the open v osition of the air escape and of the sand disc arge opening.

In the drawing :a is the sand box provided with a suitable closing device I), the said box being mounted in a suitable manner in the frame 0, 0, thus for instance by means of laterally opening hinges (Z. The box is provided at its funnel shaped discharge end with the escape nozzle for the sand.

The compressed air nozzle f is displaceably mounted upon the part c of the frame, by means of bolts g for instance, which engage with the slots h of the lower part of the nozzle. The admission of the compressed air takes place through the lateral pipe 0) of the part c of the frame and through an opening is, provided in the wall of the latter. In the example shown in the drawing the opening 76 is of elliptical cross section or it is shaped, so as to constitute a slot corresponding to the opening in the foot of the nozzle to this part the rear flattened end of the nozzle f is connected.

In the position shown in Fig. 1 of the drawing, the foot part of the nozzle closes the opening is, so that air under pressure is prevented from entering into the nozzle f. In

Specification of Letters Patent.

Application filed March 5, 1907.

Patented March 24:, 1908.

Serial No. 360,733.

this position, the inside wall of a ring shaped shoulder of the nozzle f serves at the same time as a means of closing the sand nozzle e, which extends through an opening of this tubular shaped projecting part into the interior of the same.

In the position of Fig. 2 of the drawing, the nozzle f is depressed, so that the opening of the nozzle is connected to the admission opening 7c for the air under pressure. In this position the sand discharge opening of the box a is also opened. The nozzle is preferably displaced by means of a spring acting system of levers or the like. In the form of construction, shown in the drawing the displaceable base plate of the nozzle is connected to a spindle m which is coupled with a spindle n by screw threaded connection. The spindle n is surrounded by a spiral spring 0, which rests at one end upon a projection 19 at the inside of the tube 0 of the frame, while at the other end it rests against a projection g of the spindle n. The said projection 9 serves also as a stop, so as to limit the upward movement of the spindle n. The screw threaded connection between the spindles m and n admits at the same time of a regulation of the blast, inasmuch as according to the depth, down to which the spindle m is screwed into the spindle n, the lower end position of the nozzle upon the depression of the spindles m and a may be adjusted.

By means of a pressure, exerted upon the spindles n, m in the direction of the arrow, shown in Fig. 1, the nozzle f is moved downwards, in order to uncover the opening 7c for the air under pressure and the opening of the nozzle of the sand box.

Vhat I claim and desire to secure by Letters Patent of the United States is 1. In sand blast apparatus, the combination with sand delivering means and pressure fluid delivering means, of means intermediate between said fluid delivering and sand delivering means for the simultaneous control of the opening and closing of all said delivering means and means for moving and disdelivering means and said sand delivering means and intermediate of the same and registering with any of said delivering means and means for moving and'displacing said delivering means and said closing and opening means relatively to each other.

3. In sand blast apparatus, the combination with a sand admitting nozzle and pressure fluid admitting means, of means for securing said sand admitting nozzle and said pressure fluid admitting means at an angle to each other, means for controlling the opening and closing of said pressure fluid admitting means and said sand admitting nozzle and intermediate of the same and means for moving and displacing the said closing and opening means and the sand admitting and fluid admitting means relatively to each other.

4. In sand blast apparatus, the combination with sand delivering means and pres sure fluid delivering means, of means for securing said delivering means at an angle to each other, tubular closing and opening means intermediate between said pressure fluid and sand delivering means and means for displacing said delivering means in common and at an angle to said closing and open ing means relatively to the .latter.

5. In sand blast apparatus, in combination, sand delivering nozzle and pressure fluid delivering means, arranged at an angle to each other, tubular closing and opening means, intermediate between said nozzle and delivering means, the bore of said closing and opening means registering with said fluid delivering means, a perforated part in the wall of said tubular closing and opening means registering with said sand delivering nozzle and allowing the passage of said nozzle, and means for displacing said delivering and opening means in relation to each other.

6. In a sand blast apparatus, the combi-- nation with a sand delivering nozzle and pressure fluid admitting means, of means for placing said delivering means and nozzle at an angle to each other and means for displacing said delivering means and adjusting the same in relation to each other, tubular shaped, laterally perforated closing and opening means, capable of registering with said delivering means and nozzle and intermediate of the same and spring acting means for changing the relative position of said delivering means and nozzle and said tubular closing and opening means.

7. In a sand blast apparatus, the combination with a sand boX and sand delivering means connected to said boX and. with pressure fluid delivering means, of means for changing the relative position of said sand box and sand delivering means and of said pressure fluid delivering means and adjust ing the same in relation to each other, means for interchangeably connecting said sand box to said delivering means and means for arranging said delivering means at an angle to each other, tubular shaped, laterally per forated closing and opening means, capabfe of registering with'said delivery means and intermediate of said delivery means and spring acting means for changing the relative position of said delivery means and said tubular closing and opening means.

In witness whereof I have hereunto signed my name this 19th day of February, 1907, in the presence of two subscribing witnesses.

HANS MIKOREY.

I/Vitnesses:

HENRY HASPER, ARTHUR SOI-IROEDER. 

